1. Sustainable Energy Laboratory, China University of Geosciences Wuhan, 388 Lumo Road, Wuhan 430074, China
2. Air Products and Chemicals, Inc. (Headquarters), 7201 Hamilton Boulevard, Allentown, Pennsylvania 18195-1501, United States
3. Air Products and Chemicals, Inc., 1969 Palomar Oaks Way, Carlsbad, California 92011, United States
4. Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore